Allelopathic Potential of Celosia and Euphorbia Leaf Extracts on yield per Plant (gm) in Mungbean, Chickpea and Sorghum

2015 ◽  
Keyword(s):  
Leaf Extracts ◽  
Allelopathic Potential

scholarly journals Evaluation for performance of maize and rice on aqueous leaf extracts of Flemingia semialata Roxb. -underutilized legumes in Mizoram, India

2018 ◽  
Author(s):  
Kalidas Upadhyaya ◽  
B. Gopichand ◽  
Kalidas Upadhyaya
Keyword(s):  
Root Length ◽  
Oryza Sativa L ◽  
Inhibitory Effect ◽  
Shoot Length ◽  
Growth And Yield ◽  
Leaf Extracts ◽  
Allelopathic Potential ◽  
Cent Concentration ◽  
Aqueous Leaf Extract ◽  
Laboratory Bioassays

The allelopathic potential of aqueous leaf extracts of Flemingia semialata Roxb. a leguminous herbs was used to examined its effect on growth and yield of Zea mays L. and Oryza sativa L. at different concentrations in laboratory bioassays. The extracts show both inhibitory and stimulatory effect on the test crops. Significant stimulatory effects were observed in 50 and 75 per cent concentration for root length and 25 per cent for shoot length in maize. Stimulatory effect on the root length of rice were observed at lower concentrations, however inhibitory effect were observed on the shoot length whereby the inhibitory effect increases with increase in the concentration of extracts. The inhibitory effect on biomass yield was observed at lower concentration in maize but inhibitory effect was more pronounced in rice at higher concentrations. Aqueous leaf extract of Flemingia semialata Roxb. performed better in maize than in rice.

Effect of Aqueous Leaf Extract of Parthenium hysterophorus L. on the Germination and Shoot Growth of Two Native Species

2013 ◽  
Vol 726-731 ◽  
pp. 4348-4351 ◽  
Author(s):  
Gang Hu ◽  
Zhong Hua Zhang ◽  
Bao Qing Hu
Keyword(s):  
Seed Germination ◽  
Native Species ◽  
Shoot Growth ◽  
Southern China ◽  
Parthenium Hysterophorus ◽  
Native Plant ◽  
Leaf Extracts ◽  
Allelopathic Potential ◽  
Plantago Asiatica ◽  
The Impact

In order to evaluate the allelopathic potential of an exotic invasive weed,Parthenium hysterophorusL., the effect of different concentrations of aqueous extracts (5%, 25%, 50%, 75% and 100%) prepared from leaves ofP. hysterophoruswere studied on the seed germination and seedling shoot growth of two common native herbs,Plantago asiaticaL. andYoungia japonica(L.) DC., through laboratory bioassays. The aqueous leaf extracts at the concentrations of 25%, 75% and 100% significantly inhibited the seed germination and seedling shoot growth of two target species. There was complete failure of seed germination ofY. japonicain 75% and 100% aqueous leaf extracts. The inhibitory effect increased with increasing extract concentration. These results suggested that allelopathy may play a role in the impact ofP. hysterophorusinvasion on native plant recruitment of invaded communities in southern China.

scholarly journals Exploiting the Allelopathic Potential of Aqueous Leaf Extracts of Artemisia absinthium and Psidium guajava against Parthenium hysterophorus, a Widespread Weed in India

Plants ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 552 ◽  
Author(s):  
Dhriti Kapoor ◽  
Rinzim ◽  
Anupam Tiwari ◽  
Amit Sehgal ◽  
Marco Landi ◽  
...  
Keyword(s):  
Seed Germination ◽  
Biochemical Parameters ◽  
Psidium Guajava ◽  
Parthenium Hysterophorus ◽  
Enzymatic Antioxidants ◽  
Artemisia Absinthium ◽  
Leaf Extracts ◽  
Allelopathic Potential ◽  
Root And Shoot Length ◽  
By Products

Artemisia absinthium and Psidium guajava are powerful sources of secondary metabolites, some of them with potential allelopathic activity. Both the species grow together in India with a weed (Parthenium hysterophorus) that is becoming extremely invasive. The aim of the present research was to test the allelopathic effect of A. absinthium and P. guajava aqueous leaf extracts on seed germination, seedling growth (shoot and root length), as well as some biochemical parameters (enzymatic and non-enzymatic antioxidants, photosynthetic pigments, osmolytes, and malondialdehyde by-products) of P. hysterophorus plants. Leaf extracts of both A. absinthium and P. guajava constrained the germination and seedling development (root and shoot length), affected pigment content (chlorophylls, carotenoids), stimulated the activity of antioxidant enzymes, and increased the level of malondialdehyde by-products of P. hysterophorus plants. Non-enzymatic antioxidants (glutathione and ascorbic acid) in P. hysterophorus leaves were, conversely, negatively affected by both leaf extracts tested in the present experiment. Although A. absinthium was more effective than P. guajava in impacting some biochemical parameters of P. hysterophorus leaves (including a higher EC50 for seed germination), P. guajava extract showed a higher EC50 in terms of root inhibition of P. hysterophorus seedlings. The present study provides the evidence that A. absinthium and P. guajava extract could be proficiently exploited as a botanical herbicide against P. hysterophorus.

scholarly journals ALLELOPATHIC POTENTIAL OF EXTRACTS AND LEACHATES OF AZADIRACHTA INDICA A. JUSS LEAVES ON GERMINATION AND GROWTH OF ELEUSINE CORACANA (L.) GAERTNER

2015 ◽  
Vol 2 (2) ◽  
pp. 129-132
Author(s):  
Elavazhagan P
Keyword(s):  
Azadirachta Indica ◽  
Shoot Growth ◽  
Dry Weight ◽  
Inhibitory Effect ◽  
Germination Percentage ◽  
Eleusine Coracana ◽  
Leaf Extracts ◽  
Allelopathic Potential ◽  
Root And Shoot Growth ◽  
Germination And Growth

Various concentrations (5%, 10%, 15% and 20%) of leaf leachates and leaf extracts prepared from fully senesced fallen and matured leaves of Azadirachta indica A. Juss. and used for the present experiments to determine their allelopathic potential on growth and developmental changes on Eleusine coracana (L.) Gaertner. Leaf leachates and leaf extracts sowed an inhibitory effect on germination percentage, root and shoot growth, and fresh and dry weight of E. coracana seedlings. The leaf extracts had more inhibitory effect at 20%concentration,than that of leaf leachates on morphological parameters of E. coracana

scholarly journals Congeneric comparison of allelopathic and autotoxic effects of four Solidago species

2019 ◽  
Vol 43 (2) ◽  
pp. 175-186
Author(s):  
Birutė Karpavicienė ◽  
Julija Danilovienė ◽  
Roberta Vykertaitė
Keyword(s):  
Seedling Growth ◽  
Invasive Plant ◽  
Native Plants ◽  
Allelopathic Effect ◽  
Festuca Rubra ◽  
Invasive Plant Species ◽  
Target Species ◽  
Leaf Extracts ◽  
Allelopathic Potential ◽  
Species Specific

The invasive species Solidago canadensis and S. gigantea are known for having the potential to inhibit their neighbours through allelopathy. However, there are no data on allelopathic properties of the natural interspecific hybrid S. ?niederederi and no investigations comparing the allelopathic potential of native and invasive Solidago species. We therefore studied the allelopathic effect of aqueous leaf extracts of S. virgaurea, S. canadensis, S. gigantea and S. ?niederederi on two congeneric pairs of species (Festuca and Solidago) occurring naturally in communities with the tested Solidago species. Germination and seedling growth of Festuca rubra were inhibited by all Solidago extracts more than were those characteristics of F. pratensis, while S. canadensis was more sensitive to its own and congeneric extracts than was S. ?niederederi. The effect of leaf type (green or withered) on Festuca seedling growth was target species-specific, while seed germination was more suppressed by green leaf extracts. The results of this study do not support the hypothesis that invasive plant species have stronger persistent allelopathic effects on native plants compared to their native congeners.

Assessment of allelopathic potential of Dalbergia cochinchinensis Pierre and its growth inhibitory substance

2020 ◽  
pp. 513
Author(s):  
Ramida Krumsri ◽  
Arihiro Iwasaki ◽  
Kiyotake Suenaga ◽  
Hisashi Kato-Noguchi
Keyword(s):  
Plant Species ◽  
Seedling Growth ◽  
Protocatechuic Acid ◽  
Italian Ryegrass ◽  
Test Plant ◽  
Inhibitory Substance ◽  
Leaf Extracts ◽  
Allelopathic Potential ◽  
Barnyard Grass ◽  
Growth Inhibitory

In forestry systems, many types of forest trees possess allelopathic properties and release a wide variety of allelochemicals that influence the growth and development of surrounding species. Dalbergia cochinchinensis, a forest tree distributed in Southeast Asia, is reputed to possess several biological properties and contain several secondary compounds. However, there have been no studies on the allelopathy of D. cochinchinensis. Therefore, D. cochinchinensis leaf extracts were examined for allelopathic potential. The present study showed that D. cochinchinensis extracts significantly inhibited the seedling growth of six test plant species: timothy, Italian ryegrass, barnyard grass, cress, alfalfa, and lettuce. Concentrations of the D. cochinchinensis extracts negatively correlated with the shoot length (r = −0.50 to −0.89) and root length (r = −0.65 to −0.89) of all the test plant species. The extracts were then purified using several chromatographic steps and the growth inhibitory substance was isolated. The chemical structure of the substance was identified through spectroscopic analysis as 3,4-dihydroxybenzoic acid (protocatechuic acid). Protocatechuic acid at a concentration higher than 3 mM significantly inhibited the growth of cress seedlings, whereas barnyard grass seedlings were inhibited at concentrations higher than 0.3 mM. As the protocatechuic acid concentration increased, the seedling growth of cress and barnyard grass was significantly reduced. I50 values showed the effectiveness of protocatechuic acid against both test plant species was apparently greater on root growth than shoot growth. Results of this study suggest that protocatechuic acid isolated from D. cochinchinensis might be responsible for its inhibitory effects.

scholarly journals Allelopathic effects of Ipomoea cairica (L.) Sweet on crop weeds

2011 ◽  
Vol 25 (4) ◽  
pp. 858-864 ◽  
Author(s):  
Leandro Kenji Takao ◽  
Jose Pedro Nepomuceno Ribeiro ◽  
Maria Inês Salgueiro Lima
Keyword(s):  
Early Development ◽  
Seedling Development ◽  
Target Species ◽  
Bidens Pilosa ◽  
Leaf Extracts ◽  
Allelopathic Potential ◽  
Phytotoxic Effect ◽  
Identification Of Species ◽  
Allelopathic Effects

Identification of species with allelopathic potential has been a target of researches aiming to use them to control crop weeds. Ipomoea cairica is considered a weed with allelopathic potential, which has already been reported. The goal of this study was to evaluate the allelopathic properties of leaf extracts from Ipomoea cairica on the germination and early development of four of the worst crop weeds in Brazil: Bidens pilosa L., Echinochloa crus-galli (L.) Beauv., Euphorbia heterophylla L. and Ipomoea grandifolia (Dammer) O´Donel. We tested the effects of leaf extracts, in four concentrations, on the germination and early development of these species. The extracts negatively affected the germination, early development and the morphology of all target species, and the phytotoxic effect was higher as the concentration of the extracts increased. The influence of the I. cairica extracts on germination, in addition to their effects on seedling development, made them more effective.

scholarly journals Screening of Allelochemicals in Miscanthus sacchariflorus Extracts and Assessment of Their Effects on Germination and Seedling Growth of Common Weeds

Plants ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1313
Author(s):  
Bimal Kumar Ghimire ◽  
Myeong Ha Hwang ◽  
Erik J. Sacks ◽  
Chang Yeon Yu ◽  
Seung Hyun Kim ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Field Experiments ◽  
Photosynthetic Pigment ◽  
Antioxidant Enzyme Activities ◽  
Ion Leakage ◽  
Dependent Manner ◽  
Leaf Extracts ◽  
Allelopathic Potential ◽  
Miscanthus Sacchariflorus ◽  
Root And Shoot Length

There is increasing interest in the application of bioherbicides because they are less destructive to the global ecosystem than synthetic herbicides. Research has focused on reducing the dependence upon synthetic herbicides by substituting them with environmentally and economically sustainable bioproducts. Allelopathic phytochemicals may be an efficient method for controlling weeds, benefitting both the environment and human health. This study addressed the allelopathic potential of Miscanthus sacchariflorus (MS) extracts on the germination, plant growth, biomass, and biochemical parameters (electrolyte leakage, photosynthetic pigments, and antioxidant enzyme activities) of weeds using laboratory and field experiments. Liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS) showed the presence of 22 phenolic compounds, including Orientin, Luteolin, Veratric acid, Chlorogenic acid, Protocatechuic acid, p-Coumaric acid, and Ferulic acid. Leaf extracts of M. sacchariflorus either completely suppressed or partially reduced seed germination and affected the development of weed seedlings (root and shoot length), in a dose-dependent manner. Aqueous extracts of M. sacchariflorus reduced the fresh weight and dry weight, affected the photosynthetic pigment content (chlorophylls, carotenoids), influenced the electrolyte ion leakage, and stimulated the activity of antioxidant enzymes in a species-specific manner. Pearson’s correlation analysis showed that the phenolic compound composition of M. sacchariflorus correlated with the variables tested, indicating that the phytochemicals present in the plant extracts of M. sacchariflorus are a potential source of bio-herbicides.

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